blow one's brains out

blow (one's) brains out

slang To fatally shoot someone in the head. Ray blew the informant's brains out, just as the boss told him to.See also: blow, brain, out

blow one's brains out

Shoot oneself in the head, as in Blowing one's brains out is more a man's type of suicide; women lean toward poison. [Early 1800s] See also: blow, brain, out